CN108106955A - A kind of big flow, high speed water scouring test methods - Google Patents
A kind of big flow, high speed water scouring test methods Download PDFInfo
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- CN108106955A CN108106955A CN201711338873.3A CN201711338873A CN108106955A CN 108106955 A CN108106955 A CN 108106955A CN 201711338873 A CN201711338873 A CN 201711338873A CN 108106955 A CN108106955 A CN 108106955A
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- nozzle
- high speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/567—Investigating resistance to wear or abrasion by submitting the specimen to the action of a fluid or of a fluidised material, e.g. cavitation, jet abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The present invention relates to a kind of big flow, high speed water washout test devices, including switch board, variable-frequency motor, water pump, flowmeter, feedback circuit, convergent nozzle, switch board is connected with variable-frequency motor, for controlling variable-frequency motor break-make, variable-frequency motor is connected with water pump, for controlling pump switch, feedback circuit is equipped between switch board and water pump, water pump is circumscribed with nozzle.Variable frequency pump can adjust power to change flow, with the use of the nozzle of various cross-sectional areas, can arbitrarily adjust eroding velocity and flow needed for experiment, realize accurate control.Testing equipment is simple, and use, maintenance cost are cheap.
Description
Technical field
The invention belongs to coating antiscour experimental technique fields, and in particular to a kind of big flow, high speed water washout test side
Method.
Background technology
Seaplane takes off in ocean, lake when waters, dampening, when sliding, relative velocity is even between airsurfaceunderwater
160Km/h can be reached, fuselage ship bottom paint is subjected to water high speed souring.Huge water souring power easily causes body ship
On bottom, especially the enamelled coating of rivet area peels off, and causes base material exposed.Bottom structure loses the protection of protection enamelled coating, with sky
After the gas and water even contact with sea water of severe corrosive, corrosion damage is easily generated, influences aircraft structure strength, severe patient will threaten
The flight safety of aircraft.Therefore, when aircraft ship bottom paint is selected on the water, it is necessary to experiment is carried out to its water-fast performance of flushing and is examined
Core.
Existing coating experimental technique, primarily directed to the coating or right for being subjected to the low velocity fluids such as rainwater, pipeline water and washing away
Coating carries out small area performance test, certain such as domestic experimental technique can only test the sample of a diameter of 2cm, can not be to water
Bottom covering of boarding a plane carries out washout test (containing structure positions such as rivet, external lugs), it is impossible to meet seaplane painting used
The big flow of material, the requirement of high speed water washout test.
The content of the invention
The purpose of the present invention, for solving the water-fast performance of flushing of coating used in seaplane examination problem, to fill up big
The blank of flow, high speed water washout test technology.
In view of the deficiency of existing coating scouring test methods, the present invention is proposed from key elements such as big flow, high speeds
A kind of big flow, high speed water washout test device, including switch board, variable-frequency motor, water pump, flowmeter, feedback circuit, necking spray
Mouth, switch board are connected with variable-frequency motor, and for controlling variable-frequency motor break-make, variable-frequency motor is connected with water pump, for controlling water pump
Switch, is equipped with feedback circuit between switch board and water pump, water pump is circumscribed with nozzle.
Further, said nozzle is convergent nozzle.
In order to be precisely controlled water pump, water pump is also circumscribed with flowmeter.
The method that washout test is carried out using above-mentioned experimental rig, is comprised the following steps：
Step 1：Component to be washed away is placed on testing stand, and it is fixed；
Step 2：According to experiment eroding velocity and nozzle exit product, flow Q=28L/min needed for pipeline is calculated；
Step 3：Startup power supply；
Step 4：It is 28L/min that target flow value Q is set in switch board, and error is set to ± 3；
Step 5：Start variable frequency pump；Treat water pump steady operation, and flow measurement obtain flow for Q when, proceed by and wash away
Experiment.
The principle of the invention is as follows：
In use, carrying out flow set to switch board, switch board carries out frequency control to big flow, high-pressure frequency-conversion water pump,
In flowmeter monitoring pipeline flow and Real-time Feedback to switch board to correct its output power, to change pump operation power, into
And it adjusts and stablizes flow in pipeline；And the tapered nozzle in cross section can further improve water velocity in pipeline, according to flow
Q, pipeline section product, nozzle exit product, you can calculate delivery nozzle water outlet speed.
Water can be considered incompressible fluid, i.e.,：
SAVA-Q-SBVB
Wherein：
SAIt is accumulated for pipeline section, SBIt is accumulated for nozzle exit；
VAFor flow velocity in pipeline, VBFor nozzle flow velocity；
Q obtains flow in pipeline, i.e. switch board setting flow value for flow measurement；
When in use, spout target flow rate V will can be testedBOutflow Q is calculated, flow set is carried out to switch board, you can
Start to test.
The present invention is suitable for big flow, the high speed water washout test of coating, the advantage is that：
(1) variable frequency pump can adjust power to change flow, with the use of the nozzle of various cross-sectional areas, can arbitrarily adjust
Eroding velocity and flow needed for section experiment realize accurate control.
(2) testing equipment is simple, and use, maintenance cost are cheap.
Description of the drawings
Fig. 1 is experimental rig connection diagram；
Fig. 2 is experimental rig schematic diagram.
Specific embodiment
A kind of big flow, high speed water washout test device, including switch board, variable-frequency motor M, water pump, feedback circuit F, contracting
Mouth nozzle, switch board is connected with variable-frequency motor, and for controlling variable-frequency motor break-make, variable-frequency motor is connected with water pump, for controlling
Pump switch, is equipped with feedback circuit between switch board and water pump, water pump is circumscribed with nozzle.
Further, said nozzle is convergent nozzle.
In order to be precisely controlled water pump, water pump is also circumscribed with flowmeter Q.
The method that washout test is carried out using above-mentioned experimental rig, is comprised the following steps：
Step 1：Component to be washed away is placed on testing stand, and it is fixed；
Step 2：According to experiment eroding velocity and nozzle exit product, flow needed for pipeline is calculated as 28L/min；
Step 3：Startup power supply；
Step 4：It is 28L/min that target flow value is set in switch board, and error is set to ± 3；
Step 5：Start variable frequency pump；Treat water pump steady operation, and flowmeter Q measure flow for 28L/min when, start into
Row washout test.
Certain new comprehensive examination for grinding coating system on amphibious aircraft fuselage hull bottom riveting siding has been completed at present to test
Several periodic tests of confirmatory test project, have reached expected big flow, high speed water washes away verification the verifying results, and stable operation.
Case study on implementation 1：
Using foregoing invention, big flow, high speed water scouring test methods are tried applied to amphibious aircraft hull bottom siding
Part skin areas is tested, mainly covers No. 2 stringer rivets, No. 3 stringer rivet areas, to simulate aircraft water takeoff, land, slide
Process tests eroding velocity 44m/s, flow 28L/min.
Implementation steps：According to experiment eroding velocity and nozzle exit product, flow needed for pipeline is calculated as 28L/min；
A) startup power supply；
B) it is 28L/min that target flow value is set in switch board, and error is set to ± 3；
C) variable frequency pump is started.
Treat water pump steady operation, and flow measurement obtain flow for 28L/min when, proceed by washout test.
Case study on implementation 2：
Using domestic existing water scouring test methods, eroding velocity highest 9m/s is only capable of rushing diameter 2cm testpieces
Brush.
Claims (4)
1. a kind of big flow, high speed water washout test device, it is characterised in that：Including switch board, variable-frequency motor, water pump, feedback
Circuit, convergent nozzle, switch board are connected with variable-frequency motor, and for controlling variable-frequency motor break-make, variable-frequency motor is connected with water pump, use
In control pump switch, feedback circuit is equipped between switch board and water pump, water pump is circumscribed with nozzle.
2. big flow according to claim 1, high speed water washout test device, it is characterised in that：Nozzle is convergent nozzle.
3. big flow according to claim 1, high speed water washout test device, it is characterised in that：Water pump is also circumscribed with stream
Gauge.
4. a kind of big flow, high speed water scouring test methods, it is characterised in that comprise the following steps：
Step 1：Component to be washed away is placed on testing stand, and it is fixed；
Step 2：According to experiment eroding velocity and nozzle exit product, flow needed for pipeline is calculated as 28L/min；
Step 3：Startup power supply；
Step 4：It is 28L/min that target flow value is set in switch board, and error is set to ± 3；
Step 5：Start variable frequency pump；Treat water pump steady operation, and flow measurement obtain flow for 28L/min when, proceed by punching
Brush experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711338873.3A CN108106955A (en) | 2017-12-14 | 2017-12-14 | A kind of big flow, high speed water scouring test methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711338873.3A CN108106955A (en) | 2017-12-14 | 2017-12-14 | A kind of big flow, high speed water scouring test methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108106955A true CN108106955A (en) | 2018-06-01 |
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ID=62215975
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711338873.3A Pending CN108106955A (en) | 2017-12-14 | 2017-12-14 | A kind of big flow, high speed water scouring test methods |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001101A (en) * | 2018-10-25 | 2018-12-14 | 中交（天津）生态环保设计研究院有限公司 | A kind of unified single more drawdown bailing test device and methods of pump |
| CN111551467A (en) * | 2020-06-19 | 2020-08-18 | 南京工业大学 | Method for measuring and calculating scouring pollution amount of deposited particles |
Citations (4)
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|---|---|---|---|---|
| EP0984264A2 (en) * | 1998-08-31 | 2000-03-08 | Ingersoll-Rand Company | Method and apparatus for measuring machinability and machining speed of a material |
| CN2935124Y (en) * | 2006-07-27 | 2007-08-15 | 四川大学 | Anti-impact wearable test device for high speed sand-containing water flow hydraulic engineering material |
| CN101140209A (en) * | 2007-10-08 | 2008-03-12 | 西安理工大学 | Jet stream type erosion abrasion test device |
| CN206139382U (en) * | 2016-09-05 | 2017-05-03 | 比亚迪股份有限公司 | Water injection test device |
-
2017
- 2017-12-14 CN CN201711338873.3A patent/CN108106955A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0984264A2 (en) * | 1998-08-31 | 2000-03-08 | Ingersoll-Rand Company | Method and apparatus for measuring machinability and machining speed of a material |
| CN2935124Y (en) * | 2006-07-27 | 2007-08-15 | 四川大学 | Anti-impact wearable test device for high speed sand-containing water flow hydraulic engineering material |
| CN101140209A (en) * | 2007-10-08 | 2008-03-12 | 西安理工大学 | Jet stream type erosion abrasion test device |
| CN206139382U (en) * | 2016-09-05 | 2017-05-03 | 比亚迪股份有限公司 | Water injection test device |
Non-Patent Citations (1)
| Title |
|---|
| 史忠强: "海上风电符合筒型基础周围局部冲刷研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001101A (en) * | 2018-10-25 | 2018-12-14 | 中交（天津）生态环保设计研究院有限公司 | A kind of unified single more drawdown bailing test device and methods of pump |
| CN111551467A (en) * | 2020-06-19 | 2020-08-18 | 南京工业大学 | Method for measuring and calculating scouring pollution amount of deposited particles |
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Application publication date: 20180601 |